gstreamer/gst-libs/gst/vaapi/gstvaapiobject.c

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/*
* gstvaapiobject.c - Base VA object
*
* Copyright (C) 2010-2011 Splitted-Desktop Systems
* Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
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* Copyright (C) 2012-2013 Intel Corporation
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
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/**
* SECTION:gstvaapiobject
* @short_description: Base VA object
*/
#include "sysdeps.h"
#include "gstvaapiobject.h"
#include "gstvaapiobject_priv.h"
#include "gstvaapiminiobject.h"
#include "gstvaapidisplay_priv.h"
#define DEBUG 1
#include "gstvaapidebug.h"
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static void
gst_vaapi_object_finalize (GstVaapiObject * object)
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{
const GstVaapiObjectClass *const klass = GST_VAAPI_OBJECT_GET_CLASS (object);
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if (klass->finalize)
klass->finalize (object);
gst_vaapi_display_replace (&object->display, NULL);
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}
void
gst_vaapi_object_class_init (GstVaapiObjectClass * klass, guint size)
{
GstVaapiMiniObjectClass *const object_class =
GST_VAAPI_MINI_OBJECT_CLASS (klass);
object_class->size = size;
object_class->finalize = (GDestroyNotify) gst_vaapi_object_finalize;
}
/**
* gst_vaapi_object_new:
* @klass: The object class
* @display: The #GstVaapiDisplay
*
* Creates a new #GstVaapiObject. The @klass argument shall not be
* %NULL, and it must reference a statically allocated descriptor.
*
* This function zero-initializes the derived object data. Also note
* that this is an internal function that shall not be used outside of
* libgstvaapi libraries.
*
* Returns: The newly allocated #GstVaapiObject
*/
gpointer
gst_vaapi_object_new (const GstVaapiObjectClass * klass,
GstVaapiDisplay * display)
{
const GstVaapiMiniObjectClass *const object_class =
GST_VAAPI_MINI_OBJECT_CLASS (klass);
GstVaapiObject *object;
guint sub_size;
g_return_val_if_fail (klass != NULL, NULL);
g_return_val_if_fail (display != NULL, NULL);
object = (GstVaapiObject *) gst_vaapi_mini_object_new (object_class);
if (!object)
return NULL;
object->display = gst_object_ref (display);
object->object_id = VA_INVALID_ID;
sub_size = object_class->size - sizeof (*object);
if (sub_size > 0)
memset (((guchar *) object) + sizeof (*object), 0, sub_size);
if (klass->init)
klass->init (object);
return object;
}
/**
* gst_vaapi_object_ref:
* @object: a #GstVaapiObject
*
* Atomically increases the reference count of the given @object by one.
*
* Returns: The same @object argument
*/
gpointer
gst_vaapi_object_ref (gpointer object)
{
return gst_vaapi_mini_object_ref (object);
}
/**
* gst_vaapi_object_unref:
* @object: a #GstVaapiObject
*
* Atomically decreases the reference count of the @object by one. If
* the reference count reaches zero, the object will be free'd.
*/
void
gst_vaapi_object_unref (gpointer object)
{
gst_vaapi_mini_object_unref (object);
}
/**
* gst_vaapi_object_replace:
* @old_object_ptr: a pointer to a #GstVaapiObject
* @new_object: a #GstVaapiObject
*
* Atomically replaces the object object held in @old_object_ptr with
* @new_object. This means that @old_object_ptr shall reference a
* valid object. However, @new_object can be NULL.
*/
void
gst_vaapi_object_replace (gpointer old_object_ptr, gpointer new_object)
{
gst_vaapi_mini_object_replace ((GstVaapiMiniObject **) old_object_ptr,
new_object);
}
/**
* gst_vaapi_object_get_display:
* @object: a #GstVaapiObject
*
* Returns the #GstVaapiDisplay this @object is bound to.
*
* Return value: the parent #GstVaapiDisplay object
*/
GstVaapiDisplay *
gst_vaapi_object_get_display (GstVaapiObject * object)
{
g_return_val_if_fail (object != NULL, NULL);
return GST_VAAPI_OBJECT_DISPLAY (object);
}
/**
* gst_vaapi_object_lock_display:
* @object: a #GstVaapiObject
*
* Locks @object parent display. If display is already locked by
* another thread, the current thread will block until display is
* unlocked by the other thread.
*/
void
gst_vaapi_object_lock_display (GstVaapiObject * object)
{
g_return_if_fail (object != NULL);
GST_VAAPI_OBJECT_LOCK_DISPLAY (object);
}
/**
* gst_vaapi_object_unlock_display:
* @object: a #GstVaapiObject
*
* Unlocks @object parent display. If another thread is blocked in a
* gst_vaapi_object_lock_display() call, it will be woken and can lock
* display itself.
*/
void
gst_vaapi_object_unlock_display (GstVaapiObject * object)
{
g_return_if_fail (object != NULL);
GST_VAAPI_OBJECT_UNLOCK_DISPLAY (object);
}
/**
* gst_vaapi_object_get_id:
* @object: a #GstVaapiObject
*
* Returns the #GstVaapiID contained in the @object.
*
* Return value: the #GstVaapiID of the @object
*/
GstVaapiID
gst_vaapi_object_get_id (GstVaapiObject * object)
{
g_return_val_if_fail (object != NULL, 0);
return GST_VAAPI_OBJECT_ID (object);
}